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netxen: cleanup rx handling
[linux-2.6-block.git] / drivers / net / netxen / netxen_nic_main.c
CommitLineData
3d396eb1 1/*
5d242f1c 2 * Copyright (C) 2003 - 2009 NetXen, Inc.
3d396eb1 3 * All rights reserved.
80922fbc 4 *
3d396eb1
AK		 5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
80922fbc 9 *
3d396eb1
AK		 10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
80922fbc 14 *
3d396eb1
AK		 15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
18 * MA 02111-1307, USA.
80922fbc 19 *
3d396eb1
AK		 20 * The full GNU General Public License is included in this distribution
21 * in the file called LICENSE.
80922fbc 22 *
3d396eb1
AK		 23 * Contact Information:
24 * info@netxen.com
5d242f1c
DP		 25 * NetXen Inc,
26 * 18922 Forge Drive
27 * Cupertino, CA 95014-0701
3d396eb1
AK		 28 *
29 */
30
cb8011ad 31#include <linux/vmalloc.h>
ed25ffa1 32#include <linux/highmem.h>
3d396eb1
AK		 33#include "netxen_nic_hw.h"
34
35#include "netxen_nic.h"
3d396eb1 36#include "netxen_nic_phan_reg.h"
3d396eb1 37
1494a814 38#include <linux/dma-mapping.h>
391587c3 39#include <linux/if_vlan.h>
c9bdd4b5 40#include <net/ip.h>
00977784 41#include <linux/ipv6.h>
1494a814 42
3d396eb1
AK		 43MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
44MODULE_LICENSE("GPL");
45MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
46
ceded32f 47char netxen_nic_driver_name[] = "netxen_nic";
3d396eb1 48static char netxen_nic_driver_string[] = "NetXen Network Driver version "
cb8011ad 49 NETXEN_NIC_LINUX_VERSIONID;
3d396eb1 50
2956640d
DP		 51static int port_mode = NETXEN_PORT_MODE_AUTO_NEG;
52
53/* Default to restricted 1G auto-neg mode */
54static int wol_port_mode = 5;
55
56static int use_msi = 1;
57
58static int use_msi_x = 1;
59
3d396eb1
AK		 60/* Local functions to NetXen NIC driver */
61static int __devinit netxen_nic_probe(struct pci_dev *pdev,
2956640d 62 const struct pci_device_id *ent);
3d396eb1
AK		 63static void __devexit netxen_nic_remove(struct pci_dev *pdev);
64static int netxen_nic_open(struct net_device *netdev);
65static int netxen_nic_close(struct net_device *netdev);
66static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
67static void netxen_tx_timeout(struct net_device *netdev);
6d5aefb8 68static void netxen_tx_timeout_task(struct work_struct *work);
3d396eb1 69static void netxen_watchdog(unsigned long);
bea3348e 70static int netxen_nic_poll(struct napi_struct *napi, int budget);
3d396eb1
AK		 71#ifdef CONFIG_NET_POLL_CONTROLLER
72static void netxen_nic_poll_controller(struct net_device *netdev);
73#endif
1494a814 74static irqreturn_t netxen_intr(int irq, void *data);
05aaa02d 75static irqreturn_t netxen_msi_intr(int irq, void *data);
b3df68f8 76static irqreturn_t netxen_msix_intr(int irq, void *data);
3d396eb1
AK		 77
78/* PCI Device ID Table */
70081ac5 79#define ENTRY(device) \
040dec3b 80 {PCI_DEVICE(PCI_VENDOR_ID_NETXEN, (device)), \
70081ac5
AV		 81 .class = PCI_CLASS_NETWORK_ETHERNET << 8, .class_mask = ~0}
82
3d396eb1 83static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
040dec3b
DP		 84 ENTRY(PCI_DEVICE_ID_NX2031_10GXSR),
85 ENTRY(PCI_DEVICE_ID_NX2031_10GCX4),
86 ENTRY(PCI_DEVICE_ID_NX2031_4GCU),
87 ENTRY(PCI_DEVICE_ID_NX2031_IMEZ),
88 ENTRY(PCI_DEVICE_ID_NX2031_HMEZ),
89 ENTRY(PCI_DEVICE_ID_NX2031_XG_MGMT),
90 ENTRY(PCI_DEVICE_ID_NX2031_XG_MGMT2),
91 ENTRY(PCI_DEVICE_ID_NX3031),
3d396eb1
AK		 92 {0,}
93};
94
95MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
96
b1555130
AB		 97/*
98 * In netxen_nic_down(), we must wait for any pending callback requests into
99 * netxen_watchdog_task() to complete; eg otherwise the watchdog_timer could be
100 * reenabled right after it is deleted in netxen_nic_down().
101 * FLUSH_SCHEDULED_WORK() does this synchronization.
102 *
103 * Normally, schedule_work()/flush_scheduled_work() could have worked, but
104 * netxen_nic_close() is invoked with kernel rtnl lock held. netif_carrier_off()
105 * call in netxen_nic_close() triggers a schedule_work(&linkwatch_work), and a
106 * subsequent call to flush_scheduled_work() in netxen_nic_down() would cause
107 * linkwatch_event() to be executed which also attempts to acquire the rtnl
108 * lock thus causing a deadlock.
109 */
110
111static struct workqueue_struct *netxen_workq;
112#define SCHEDULE_WORK(tp) queue_work(netxen_workq, tp)
113#define FLUSH_SCHEDULED_WORK() flush_workqueue(netxen_workq)
114
ed25ffa1
AK		 115static void netxen_watchdog(unsigned long);
116
7830b22c
DP		 117static uint32_t crb_cmd_producer[4] = {
118 CRB_CMD_PRODUCER_OFFSET, CRB_CMD_PRODUCER_OFFSET_1,
119 CRB_CMD_PRODUCER_OFFSET_2, CRB_CMD_PRODUCER_OFFSET_3
120};
121
c9fc891f 122void
3ce06a32
DP		 123netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
124 uint32_t crb_producer)
3176ff3e 125{
3ce06a32
DP		 126 adapter->pci_write_normalize(adapter,
127 adapter->crb_addr_cmd_producer, crb_producer);
3176ff3e
MT		 128}
129
7830b22c
DP		 130static uint32_t crb_cmd_consumer[4] = {
131 CRB_CMD_CONSUMER_OFFSET, CRB_CMD_CONSUMER_OFFSET_1,
132 CRB_CMD_CONSUMER_OFFSET_2, CRB_CMD_CONSUMER_OFFSET_3
133};
134
3ce06a32
DP		 135static inline void
136netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
137 u32 crb_consumer)
3176ff3e 138{
3ce06a32
DP		 139 adapter->pci_write_normalize(adapter,
140 adapter->crb_addr_cmd_consumer, crb_consumer);
3176ff3e
MT		 141}
142
2956640d 143static uint32_t msi_tgt_status[8] = {
443be796 144 ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
2956640d
DP		 145 ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3,
146 ISR_INT_TARGET_STATUS_F4, ISR_INT_TARGET_STATUS_F5,
147 ISR_INT_TARGET_STATUS_F6, ISR_INT_TARGET_STATUS_F7
443be796
DP		 148};
149
2956640d
DP		 150static struct netxen_legacy_intr_set legacy_intr[] = NX_LEGACY_INTR_CONFIG;
151
092bc571 152static inline void netxen_nic_disable_int(struct netxen_adapter *adapter)
4638aef1 153{
092bc571 154 adapter->pci_write_normalize(adapter, adapter->crb_intr_mask, 0);
4638aef1
SH		 155}
156
092bc571 157static inline void netxen_nic_enable_int(struct netxen_adapter *adapter)
4638aef1 158{
48bfd1e0 159 adapter->pci_write_normalize(adapter, adapter->crb_intr_mask, 0x1);
4638aef1 160
092bc571
DP		 161 if (!NETXEN_IS_MSI_FAMILY(adapter))
162 adapter->pci_write_immediate(adapter,
163 adapter->legacy_intr.tgt_mask_reg, 0xfbff);
4638aef1
SH		 164}
165
2956640d
DP		 166static int nx_set_dma_mask(struct netxen_adapter *adapter, uint8_t revision_id)
167{
168 struct pci_dev *pdev = adapter->pdev;
1f434f63
DP		 169 uint64_t mask, cmask;
170
171 adapter->pci_using_dac = 0;
2956640d 172
1f434f63 173 mask = DMA_32BIT_MASK;
2956640d
DP		 174 /*
175 * Consistent DMA mask is set to 32 bit because it cannot be set to
176 * 35 bits. For P3 also leave it at 32 bits for now. Only the rings
177 * come off this pool.
178 */
1f434f63
DP		 179 cmask = DMA_32BIT_MASK;
180
181#ifndef CONFIG_IA64
182 if (revision_id >= NX_P3_B0)
183 mask = DMA_39BIT_MASK;
184 else if (revision_id == NX_P2_C1)
185 mask = DMA_35BIT_MASK;
186#endif
2956640d 187 if (pci_set_dma_mask(pdev, mask) == 0 &&
1f434f63 188 pci_set_consistent_dma_mask(pdev, cmask) == 0) {
2956640d
DP		 189 adapter->pci_using_dac = 1;
190 return 0;
191 }
2956640d 192
1f434f63
DP		 193 return -EIO;
194}
195
196/* Update addressable range if firmware supports it */
197static int
198nx_update_dma_mask(struct netxen_adapter *adapter)
199{
200 int change, shift, err;
201 uint64_t mask, old_mask;
202 struct pci_dev *pdev = adapter->pdev;
203
204 change = 0;
205
206 shift = netxen_nic_reg_read(adapter, CRB_DMA_SHIFT);
207 if (shift >= 32)
208 return 0;
209
210 if (NX_IS_REVISION_P3(adapter->ahw.revision_id) && (shift > 9))
211 change = 1;
212 else if ((adapter->ahw.revision_id == NX_P2_C1) && (shift <= 4))
213 change = 1;
214
215 if (change) {
216 old_mask = pdev->dma_mask;
217 mask = (1ULL<<(32+shift)) - 1;
218
219 err = pci_set_dma_mask(pdev, mask);
220 if (err)
221 return pci_set_dma_mask(pdev, old_mask);
2956640d
DP		 222 }
223
2956640d
DP		 224 return 0;
225}
226
227static void netxen_check_options(struct netxen_adapter *adapter)
228{
229 switch (adapter->ahw.boardcfg.board_type) {
230 case NETXEN_BRDTYPE_P3_HMEZ:
231 case NETXEN_BRDTYPE_P3_XG_LOM:
232 case NETXEN_BRDTYPE_P3_10G_CX4:
233 case NETXEN_BRDTYPE_P3_10G_CX4_LP:
234 case NETXEN_BRDTYPE_P3_IMEZ:
235 case NETXEN_BRDTYPE_P3_10G_SFP_PLUS:
a70f9393
DP		 236 case NETXEN_BRDTYPE_P3_10G_SFP_QT:
237 case NETXEN_BRDTYPE_P3_10G_SFP_CT:
2956640d
DP		 238 case NETXEN_BRDTYPE_P3_10G_XFP:
239 case NETXEN_BRDTYPE_P3_10000_BASE_T:
240 adapter->msix_supported = !!use_msi_x;
241 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
242 break;
243
244 case NETXEN_BRDTYPE_P2_SB31_10G:
245 case NETXEN_BRDTYPE_P2_SB31_10G_CX4:
246 case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
247 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
248 adapter->msix_supported = 0;
249 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
250 break;
251
252 case NETXEN_BRDTYPE_P3_REF_QG:
253 case NETXEN_BRDTYPE_P3_4_GB:
254 case NETXEN_BRDTYPE_P3_4_GB_MM:
ec68db69 255 adapter->msix_supported = !!use_msi_x;
c7860a2a 256 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
a70f9393
DP		 257 break;
258
2956640d
DP		 259 case NETXEN_BRDTYPE_P2_SB35_4G:
260 case NETXEN_BRDTYPE_P2_SB31_2G:
261 adapter->msix_supported = 0;
262 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
263 break;
264
c7860a2a
DP		 265 case NETXEN_BRDTYPE_P3_10G_TP:
266 adapter->msix_supported = !!use_msi_x;
267 if (adapter->ahw.board_type == NETXEN_NIC_XGBE)
268 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
269 else
270 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
271 break;
272
2956640d
DP		 273 default:
274 adapter->msix_supported = 0;
275 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
276
277 printk(KERN_WARNING "Unknown board type(0x%x)\n",
278 adapter->ahw.boardcfg.board_type);
279 break;
280 }
281
282 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
283 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
284 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
285
286 adapter->max_possible_rss_rings = 1;
287 return;
288}
289
290static int
291netxen_check_hw_init(struct netxen_adapter *adapter, int first_boot)
292{
27c915a4 293 u32 val, timeout;
2956640d
DP		 294
295 if (first_boot == 0x55555555) {
296 /* This is the first boot after power up */
27c915a4
DP		 297 adapter->pci_write_normalize(adapter,
298 NETXEN_CAM_RAM(0x1fc), NETXEN_BDINFO_MAGIC);
299
300 if (!NX_IS_REVISION_P2(adapter->ahw.revision_id))
301 return 0;
2956640d
DP		 302
303 /* PCI bus master workaround */
304 adapter->hw_read_wx(adapter,
305 NETXEN_PCIE_REG(0x4), &first_boot, 4);
306 if (!(first_boot & 0x4)) {
307 first_boot |= 0x4;
308 adapter->hw_write_wx(adapter,
309 NETXEN_PCIE_REG(0x4), &first_boot, 4);
310 adapter->hw_read_wx(adapter,
311 NETXEN_PCIE_REG(0x4), &first_boot, 4);
312 }
313
314 /* This is the first boot after power up */
315 adapter->hw_read_wx(adapter,
316 NETXEN_ROMUSB_GLB_SW_RESET, &first_boot, 4);
317 if (first_boot != 0x80000f) {
318 /* clear the register for future unloads/loads */
319 adapter->pci_write_normalize(adapter,
320 NETXEN_CAM_RAM(0x1fc), 0);
27c915a4 321 return -EIO;
2956640d
DP		 322 }
323
27c915a4
DP		 324 /* Start P2 boot loader */
325 val = adapter->pci_read_normalize(adapter,
326 NETXEN_ROMUSB_GLB_PEGTUNE_DONE);
327 adapter->pci_write_normalize(adapter,
328 NETXEN_ROMUSB_GLB_PEGTUNE_DONE, val | 0x1);
329 timeout = 0;
330 do {
331 msleep(1);
332 val = adapter->pci_read_normalize(adapter,
333 NETXEN_CAM_RAM(0x1fc));
334
335 if (++timeout > 5000)
336 return -EIO;
337
338 } while (val == NETXEN_BDINFO_MAGIC);
2956640d 339 }
27c915a4 340 return 0;
2956640d
DP		 341}
342
343static void netxen_set_port_mode(struct netxen_adapter *adapter)
344{
345 u32 val, data;
346
347 val = adapter->ahw.boardcfg.board_type;
348 if ((val == NETXEN_BRDTYPE_P3_HMEZ) ||
349 (val == NETXEN_BRDTYPE_P3_XG_LOM)) {
350 if (port_mode == NETXEN_PORT_MODE_802_3_AP) {
351 data = NETXEN_PORT_MODE_802_3_AP;
352 adapter->hw_write_wx(adapter,
353 NETXEN_PORT_MODE_ADDR, &data, 4);
354 } else if (port_mode == NETXEN_PORT_MODE_XG) {
355 data = NETXEN_PORT_MODE_XG;
356 adapter->hw_write_wx(adapter,
357 NETXEN_PORT_MODE_ADDR, &data, 4);
358 } else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_1G) {
359 data = NETXEN_PORT_MODE_AUTO_NEG_1G;
360 adapter->hw_write_wx(adapter,
361 NETXEN_PORT_MODE_ADDR, &data, 4);
362 } else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_XG) {
363 data = NETXEN_PORT_MODE_AUTO_NEG_XG;
364 adapter->hw_write_wx(adapter,
365 NETXEN_PORT_MODE_ADDR, &data, 4);
366 } else {
367 data = NETXEN_PORT_MODE_AUTO_NEG;
368 adapter->hw_write_wx(adapter,
369 NETXEN_PORT_MODE_ADDR, &data, 4);
370 }
371
372 if ((wol_port_mode != NETXEN_PORT_MODE_802_3_AP) &&
373 (wol_port_mode != NETXEN_PORT_MODE_XG) &&
374 (wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_1G) &&
375 (wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_XG)) {
376 wol_port_mode = NETXEN_PORT_MODE_AUTO_NEG;
377 }
378 adapter->hw_write_wx(adapter, NETXEN_WOL_PORT_MODE,
379 &wol_port_mode, 4);
380 }
381}
382
2956640d
DP		 383static void netxen_set_msix_bit(struct pci_dev *pdev, int enable)
384{
385 u32 control;
386 int pos;
387
388 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
389 if (pos) {
390 pci_read_config_dword(pdev, pos, &control);
391 if (enable)
392 control |= PCI_MSIX_FLAGS_ENABLE;
393 else
394 control = 0;
395 pci_write_config_dword(pdev, pos, control);
396 }
397}
398
399static void netxen_init_msix_entries(struct netxen_adapter *adapter)
400{
401 int i;
402
403 for (i = 0; i < MSIX_ENTRIES_PER_ADAPTER; i++)
404 adapter->msix_entries[i].entry = i;
405}
406
9dc28efe
DP		 407static int
408netxen_read_mac_addr(struct netxen_adapter *adapter)
409{
410 int i;
411 unsigned char *p;
412 __le64 mac_addr;
9dc28efe
DP		 413 struct net_device *netdev = adapter->netdev;
414 struct pci_dev *pdev = adapter->pdev;
415
416 if (netxen_is_flash_supported(adapter) != 0)
417 return -EIO;
418
419 if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
420 if (netxen_p3_get_mac_addr(adapter, &mac_addr) != 0)
421 return -EIO;
422 } else {
423 if (netxen_get_flash_mac_addr(adapter, &mac_addr) != 0)
424 return -EIO;
425 }
426
427 p = (unsigned char *)&mac_addr;
428 for (i = 0; i < 6; i++)
429 netdev->dev_addr[i] = *(p + 5 - i);
430
431 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
432
433 /* set station address */
434
e174961c
JB		 435 if (!is_valid_ether_addr(netdev->perm_addr))
436 dev_warn(&pdev->dev, "Bad MAC address %pM.\n", netdev->dev_addr);
437 else
9dc28efe
DP		 438 adapter->macaddr_set(adapter, netdev->dev_addr);
439
440 return 0;
441}
442
1abd266f
SH		 443static void netxen_set_multicast_list(struct net_device *dev)
444{
445 struct netxen_adapter *adapter = netdev_priv(dev);
446
447 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
448 netxen_p3_nic_set_multi(dev);
449 else
450 netxen_p2_nic_set_multi(dev);
451}
452
453static const struct net_device_ops netxen_netdev_ops = {
454 .ndo_open = netxen_nic_open,
455 .ndo_stop = netxen_nic_close,
456 .ndo_start_xmit = netxen_nic_xmit_frame,
457 .ndo_get_stats = netxen_nic_get_stats,
458 .ndo_validate_addr = eth_validate_addr,
459 .ndo_set_multicast_list = netxen_set_multicast_list,
460 .ndo_set_mac_address = netxen_nic_set_mac,
461 .ndo_change_mtu = netxen_nic_change_mtu,
462 .ndo_tx_timeout = netxen_tx_timeout,
463#ifdef CONFIG_NET_POLL_CONTROLLER
464 .ndo_poll_controller = netxen_nic_poll_controller,
465#endif
466};
467
97daee83
DP		 468static void
469netxen_setup_intr(struct netxen_adapter *adapter)
470{
471 struct netxen_legacy_intr_set *legacy_intrp;
472 struct pci_dev *pdev = adapter->pdev;
473
474 adapter->flags &= ~(NETXEN_NIC_MSI_ENABLED | NETXEN_NIC_MSIX_ENABLED);
475 adapter->intr_scheme = -1;
476 adapter->msi_mode = -1;
477
478 if (adapter->ahw.revision_id >= NX_P3_B0)
479 legacy_intrp = &legacy_intr[adapter->ahw.pci_func];
480 else
481 legacy_intrp = &legacy_intr[0];
482 adapter->legacy_intr.int_vec_bit = legacy_intrp->int_vec_bit;
483 adapter->legacy_intr.tgt_status_reg = legacy_intrp->tgt_status_reg;
484 adapter->legacy_intr.tgt_mask_reg = legacy_intrp->tgt_mask_reg;
485 adapter->legacy_intr.pci_int_reg = legacy_intrp->pci_int_reg;
486
487 netxen_set_msix_bit(pdev, 0);
488
489 if (adapter->msix_supported) {
490
491 netxen_init_msix_entries(adapter);
492 if (pci_enable_msix(pdev, adapter->msix_entries,
493 MSIX_ENTRIES_PER_ADAPTER))
494 goto request_msi;
495
496 adapter->flags |= NETXEN_NIC_MSIX_ENABLED;
497 netxen_set_msix_bit(pdev, 1);
498 dev_info(&pdev->dev, "using msi-x interrupts\n");
499
500 } else {
501request_msi:
502 if (use_msi && !pci_enable_msi(pdev)) {
503 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
504 dev_info(&pdev->dev, "using msi interrupts\n");
505 } else
506 dev_info(&pdev->dev, "using legacy interrupts\n");
507 }
508}
509
510static void
511netxen_teardown_intr(struct netxen_adapter *adapter)
512{
513 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
514 pci_disable_msix(adapter->pdev);
515 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
516 pci_disable_msi(adapter->pdev);
517}
518
519static void
520netxen_cleanup_pci_map(struct netxen_adapter *adapter)
521{
522 if (adapter->ahw.db_base != NULL)
523 iounmap(adapter->ahw.db_base);
524 if (adapter->ahw.pci_base0 != NULL)
525 iounmap(adapter->ahw.pci_base0);
526 if (adapter->ahw.pci_base1 != NULL)
527 iounmap(adapter->ahw.pci_base1);
528 if (adapter->ahw.pci_base2 != NULL)
529 iounmap(adapter->ahw.pci_base2);
530}
531
532static int
533netxen_setup_pci_map(struct netxen_adapter *adapter)
534{
535 void __iomem *mem_ptr0 = NULL;
536 void __iomem *mem_ptr1 = NULL;
537 void __iomem *mem_ptr2 = NULL;
538 void __iomem *db_ptr = NULL;
539
540 unsigned long first_page_group_end;
541 unsigned long first_page_group_start;
542 unsigned long mem_base, mem_len, db_base, db_len = 0, pci_len0 = 0;
543
544 struct pci_dev *pdev = adapter->pdev;
545 int pci_func = adapter->ahw.pci_func;
546
547 int err = 0;
548
549 /*
550 * Set the CRB window to invalid. If any register in window 0 is
551 * accessed it should set the window to 0 and then reset it to 1.
552 */
553 adapter->curr_window = 255;
554 adapter->ahw.qdr_sn_window = -1;
555 adapter->ahw.ddr_mn_window = -1;
556
557 /* remap phys address */
558 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
559 mem_len = pci_resource_len(pdev, 0);
560 pci_len0 = 0;
561
562 adapter->hw_write_wx = netxen_nic_hw_write_wx_128M;
563 adapter->hw_read_wx = netxen_nic_hw_read_wx_128M;
564 adapter->pci_read_immediate = netxen_nic_pci_read_immediate_128M;
565 adapter->pci_write_immediate = netxen_nic_pci_write_immediate_128M;
566 adapter->pci_read_normalize = netxen_nic_pci_read_normalize_128M;
567 adapter->pci_write_normalize = netxen_nic_pci_write_normalize_128M;
568 adapter->pci_set_window = netxen_nic_pci_set_window_128M;
569 adapter->pci_mem_read = netxen_nic_pci_mem_read_128M;
570 adapter->pci_mem_write = netxen_nic_pci_mem_write_128M;
571
572 /* 128 Meg of memory */
573 if (mem_len == NETXEN_PCI_128MB_SIZE) {
574 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
575 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
576 SECOND_PAGE_GROUP_SIZE);
577 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
578 THIRD_PAGE_GROUP_SIZE);
579 first_page_group_start = FIRST_PAGE_GROUP_START;
580 first_page_group_end = FIRST_PAGE_GROUP_END;
581 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
582 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
583 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
584 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
585 first_page_group_start = 0;
586 first_page_group_end = 0;
587 } else if (mem_len == NETXEN_PCI_2MB_SIZE) {
588 adapter->hw_write_wx = netxen_nic_hw_write_wx_2M;
589 adapter->hw_read_wx = netxen_nic_hw_read_wx_2M;
590 adapter->pci_read_immediate = netxen_nic_pci_read_immediate_2M;
591 adapter->pci_write_immediate =
592 netxen_nic_pci_write_immediate_2M;
593 adapter->pci_read_normalize = netxen_nic_pci_read_normalize_2M;
594 adapter->pci_write_normalize =
595 netxen_nic_pci_write_normalize_2M;
596 adapter->pci_set_window = netxen_nic_pci_set_window_2M;
597 adapter->pci_mem_read = netxen_nic_pci_mem_read_2M;
598 adapter->pci_mem_write = netxen_nic_pci_mem_write_2M;
599
600 mem_ptr0 = pci_ioremap_bar(pdev, 0);
601 if (mem_ptr0 == NULL) {
602 dev_err(&pdev->dev, "failed to map PCI bar 0\n");
603 return -EIO;
604 }
605 pci_len0 = mem_len;
606 first_page_group_start = 0;
607 first_page_group_end = 0;
608
609 adapter->ahw.ddr_mn_window = 0;
610 adapter->ahw.qdr_sn_window = 0;
611
612 adapter->ahw.mn_win_crb = 0x100000 + PCIX_MN_WINDOW +
613 (pci_func * 0x20);
614 adapter->ahw.ms_win_crb = 0x100000 + PCIX_SN_WINDOW;
615 if (pci_func < 4)
616 adapter->ahw.ms_win_crb += (pci_func * 0x20);
617 else
618 adapter->ahw.ms_win_crb +=
619 0xA0 + ((pci_func - 4) * 0x10);
620 } else {
621 return -EIO;
622 }
623
624 dev_info(&pdev->dev, "%dMB memory map\n", (int)(mem_len>>20));
625
626 adapter->ahw.pci_base0 = mem_ptr0;
627 adapter->ahw.pci_len0 = pci_len0;
628 adapter->ahw.first_page_group_start = first_page_group_start;
629 adapter->ahw.first_page_group_end = first_page_group_end;
630 adapter->ahw.pci_base1 = mem_ptr1;
631 adapter->ahw.pci_base2 = mem_ptr2;
632
633 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
634 goto skip_doorbell;
635
636 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
637 db_len = pci_resource_len(pdev, 4);
638
639 if (db_len == 0) {
640 printk(KERN_ERR "%s: doorbell is disabled\n",
641 netxen_nic_driver_name);
642 err = -EIO;
643 goto err_out;
644 }
645
646 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
647 if (!db_ptr) {
648 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
649 netxen_nic_driver_name);
650 err = -EIO;
651 goto err_out;
652 }
653
654skip_doorbell:
655 adapter->ahw.db_base = db_ptr;
656 adapter->ahw.db_len = db_len;
657 return 0;
658
659err_out:
660 netxen_cleanup_pci_map(adapter);
661 return err;
662}
663
ba599d4f
DP		 664static int
665netxen_start_firmware(struct netxen_adapter *adapter)
666{
667 int val, err, first_boot;
668 struct pci_dev *pdev = adapter->pdev;
669
670 first_boot = adapter->pci_read_normalize(adapter,
671 NETXEN_CAM_RAM(0x1fc));
672
673 err = netxen_check_hw_init(adapter, first_boot);
674 if (err) {
675 dev_err(&pdev->dev, "error in init HW init sequence\n");
676 return err;
677 }
678
ba599d4f
DP		 679 if (first_boot != 0x55555555) {
680 adapter->pci_write_normalize(adapter,
681 CRB_CMDPEG_STATE, 0);
682 netxen_pinit_from_rom(adapter, 0);
683 msleep(1);
684 }
567c6c4e 685
1f434f63 686 netxen_nic_reg_write(adapter, CRB_DMA_SHIFT, 0x55555555);
567c6c4e
DP		 687 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
688 netxen_set_port_mode(adapter);
689
ba599d4f
DP		 690 netxen_load_firmware(adapter);
691
692 if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
693
694 /* Initialize multicast addr pool owners */
695 val = 0x7654;
696 if (adapter->ahw.board_type == NETXEN_NIC_XGBE)
697 val |= 0x0f000000;
698 netxen_crb_writelit_adapter(adapter,
699 NETXEN_MAC_ADDR_CNTL_REG, val);
700
701 }
702
703 err = netxen_initialize_adapter_offload(adapter);
704 if (err)
705 return err;
706
707 /*
708 * Tell the hardware our version number.
709 */
710 val = (_NETXEN_NIC_LINUX_MAJOR << 16)
711 | ((_NETXEN_NIC_LINUX_MINOR << 8))
712 | (_NETXEN_NIC_LINUX_SUBVERSION);
713 adapter->pci_write_normalize(adapter, CRB_DRIVER_VERSION, val);
714
715 /* Handshake with the card before we register the devices. */
716 err = netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
717 if (err) {
718 netxen_free_adapter_offload(adapter);
719 return err;
720 }
721
722 return 0;
723}
724
3d396eb1
AK		 725static int __devinit
726netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
727{
728 struct net_device *netdev = NULL;
729 struct netxen_adapter *adapter = NULL;
2956640d 730 int i = 0, err;
ba599d4f 731 int first_driver;
6c80b18d 732 u32 val;
3176ff3e 733 int pci_func_id = PCI_FUNC(pdev->devfn);
2956640d 734 uint8_t revision_id;
3d396eb1 735
dcd56fdb 736 if (pci_func_id == 0)
2956640d 737 printk(KERN_INFO "%s\n", netxen_nic_driver_string);
6c80b18d 738
3176ff3e 739 if (pdev->class != 0x020000) {
dcd56fdb 740 printk(KERN_DEBUG "NetXen function %d, class %x will not "
3176ff3e 741 "be enabled.\n",pci_func_id, pdev->class);
ed25ffa1
AK		 742 return -ENODEV;
743 }
2956640d 744
11d89d63
DP		 745 if (pdev->revision >= NX_P3_A0 && pdev->revision < NX_P3_B1) {
746 printk(KERN_WARNING "NetXen chip revisions between 0x%x-0x%x"
747 "will not be enabled.\n",
748 NX_P3_A0, NX_P3_B1);
749 return -ENODEV;
750 }
751
3d396eb1
AK		 752 if ((err = pci_enable_device(pdev)))
753 return err;
2956640d 754
3d396eb1
AK		 755 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
756 err = -ENODEV;
757 goto err_out_disable_pdev;
758 }
759
760 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
761 goto err_out_disable_pdev;
762
763 pci_set_master(pdev);
3176ff3e
MT		 764
765 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
766 if(!netdev) {
767 printk(KERN_ERR"%s: Failed to allocate memory for the "
768 "device block.Check system memory resource"
769 " usage.\n", netxen_nic_driver_name);
770 goto err_out_free_res;
771 }
772
3176ff3e
MT		 773 SET_NETDEV_DEV(netdev, &pdev->dev);
774
4cf1653a 775 adapter = netdev_priv(netdev);
2956640d
DP		 776 adapter->netdev = netdev;
777 adapter->pdev = pdev;
13ba9c77 778 adapter->ahw.pci_func = pci_func_id;
2956640d
DP		 779
780 revision_id = pdev->revision;
781 adapter->ahw.revision_id = revision_id;
782
783 err = nx_set_dma_mask(adapter, revision_id);
784 if (err)
785 goto err_out_free_netdev;
786
3ce06a32 787 rwlock_init(&adapter->adapter_lock);
3ce06a32 788
97daee83
DP		 789 err = netxen_setup_pci_map(adapter);
790 if (err)
6c80b18d 791 goto err_out_free_netdev;
3d396eb1 792
bea3348e 793 netif_napi_add(netdev, &adapter->napi,
2956640d
DP		 794 netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
795
2d1a3bbd 796 /* This will be reset for mezz cards */
3176ff3e 797 adapter->portnum = pci_func_id;
2d1a3bbd 798 adapter->status &= ~NETXEN_NETDEV_STATUS;
200eef20 799 adapter->rx_csum = 1;
623621b0 800 adapter->mc_enabled = 0;
83821a07 801 if (NX_IS_REVISION_P3(revision_id))
2956640d 802 adapter->max_mc_count = 38;
83821a07 803 else
2956640d 804 adapter->max_mc_count = 16;
3176ff3e 805
1abd266f 806 netdev->netdev_ops = &netxen_netdev_ops;
05aaa02d 807 netdev->watchdog_timeo = 2*HZ;
3176ff3e
MT		 808
809 netxen_nic_change_mtu(netdev, netdev->mtu);
810
811 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
1abd266f 812
cdff1036
DP		 813 netdev->features |= (NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO);
814 netdev->vlan_features |= (NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO);
815
cd1f8160 816 if (NX_IS_REVISION_P3(revision_id)) {
cdff1036
DP		 817 netdev->features |= (NETIF_F_IPV6_CSUM | NETIF_F_TSO6);
818 netdev->vlan_features |= (NETIF_F_IPV6_CSUM | NETIF_F_TSO6);
cd1f8160 819 }
3176ff3e 820
cdff1036 821 if (adapter->pci_using_dac) {
3176ff3e 822 netdev->features |= NETIF_F_HIGHDMA;
cdff1036
DP		 823 netdev->vlan_features |= NETIF_F_HIGHDMA;
824 }
3176ff3e 825
dcd56fdb
DP		 826 if (netxen_nic_get_board_info(adapter) != 0) {
827 printk("%s: Error getting board config info.\n",
2956640d 828 netxen_nic_driver_name);
dcd56fdb
DP		 829 err = -EIO;
830 goto err_out_iounmap;
831 }
6c80b18d 832
6c80b18d
MT		 833 netxen_initialize_adapter_ops(adapter);
834
13ba9c77 835 /* Mezz cards have PCI function 0,2,3 enabled */
dc515f2e
DP		 836 switch (adapter->ahw.boardcfg.board_type) {
837 case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
838 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
839 if (pci_func_id >= 2)
13ba9c77 840 adapter->portnum = pci_func_id - 2;
dc515f2e
DP		 841 break;
842 default:
843 break;
844 }
13ba9c77 845
2956640d
DP		 846 /*
847 * This call will setup various max rx/tx counts.
848 * It must be done before any buffer/ring allocations.
849 */
850 netxen_check_options(adapter);
3d396eb1 851
2956640d
DP		 852 first_driver = 0;
853 if (NX_IS_REVISION_P3(revision_id)) {
854 if (adapter->ahw.pci_func == 0)
855 first_driver = 1;
856 } else {
857 if (adapter->portnum == 0)
858 first_driver = 1;
859 }
3d396eb1 860
2956640d 861 if (first_driver) {
ba599d4f 862 err = netxen_start_firmware(adapter);
2956640d
DP		 863 if (err)
864 goto err_out_iounmap;
ba599d4f 865 }
2956640d 866
1f434f63
DP		 867 nx_update_dma_mask(adapter);
868
2956640d 869 netxen_nic_flash_print(adapter);
3d396eb1 870
d9e651bc
DP		 871 if (NX_IS_REVISION_P3(revision_id)) {
872 adapter->hw_read_wx(adapter,
873 NETXEN_MIU_MN_CONTROL, &val, 4);
874 adapter->ahw.cut_through = (val & 0x4) ? 1 : 0;
875 dev_info(&pdev->dev, "firmware running in %s mode\n",
876 adapter->ahw.cut_through ? "cut through" : "legacy");
877 }
878
3d396eb1 879 /*
6c80b18d 880 * See if the firmware gave us a virtual-physical port mapping.
3d396eb1 881 */
dcd56fdb 882 adapter->physical_port = adapter->portnum;
044fad0d
DP		 883 if (adapter->fw_major < 4) {
884 i = adapter->pci_read_normalize(adapter,
885 CRB_V2P(adapter->portnum));
886 if (i != 0x55555555)
887 adapter->physical_port = i;
888 }
6c80b18d 889
2956640d
DP		 890 adapter->flags &= ~(NETXEN_NIC_MSI_ENABLED | NETXEN_NIC_MSIX_ENABLED);
891
892 netxen_set_msix_bit(pdev, 0);
893
97daee83 894 netxen_setup_intr(adapter);
2956640d
DP		 895
896 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
897 netdev->irq = adapter->msix_entries[0].vector;
898 else
899 netdev->irq = pdev->irq;
900
901 err = netxen_receive_peg_ready(adapter);
902 if (err)
903 goto err_out_disable_msi;
904
905 init_timer(&adapter->watchdog_timer);
2956640d
DP		 906 adapter->watchdog_timer.function = &netxen_watchdog;
907 adapter->watchdog_timer.data = (unsigned long)adapter;
908 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
909 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
910
9dc28efe
DP		 911 err = netxen_read_mac_addr(adapter);
912 if (err)
913 dev_warn(&pdev->dev, "failed to read mac addr\n");
2956640d 914
3176ff3e
MT		 915 netif_carrier_off(netdev);
916 netif_stop_queue(netdev);
917
6c80b18d
MT		 918 if ((err = register_netdev(netdev))) {
919 printk(KERN_ERR "%s: register_netdev failed port #%d"
920 " aborting\n", netxen_nic_driver_name,
921 adapter->portnum);
922 err = -EIO;
2956640d 923 goto err_out_disable_msi;
6c80b18d
MT		 924 }
925
926 pci_set_drvdata(pdev, adapter);
3d396eb1 927
2956640d
DP		 928 switch (adapter->ahw.board_type) {
929 case NETXEN_NIC_GBE:
930 dev_info(&adapter->pdev->dev, "%s: GbE port initialized\n",
931 adapter->netdev->name);
932 break;
933 case NETXEN_NIC_XGBE:
934 dev_info(&adapter->pdev->dev, "%s: XGbE port initialized\n",
935 adapter->netdev->name);
936 break;
3d396eb1 937 }
3d396eb1 938
2956640d
DP		 939 return 0;
940
941err_out_disable_msi:
97daee83 942 netxen_teardown_intr(adapter);
6c80b18d 943
2956640d
DP		 944 if (first_driver)
945 netxen_free_adapter_offload(adapter);
3d396eb1 946
2956640d 947err_out_iounmap:
97daee83 948 netxen_cleanup_pci_map(adapter);
cb8011ad 949
6c80b18d
MT		 950err_out_free_netdev:
951 free_netdev(netdev);
952
953err_out_free_res:
3d396eb1 954 pci_release_regions(pdev);
6c80b18d
MT		 955
956err_out_disable_pdev:
2956640d 957 pci_set_drvdata(pdev, NULL);
3d396eb1
AK		 958 pci_disable_device(pdev);
959 return err;
960}
961
962static void __devexit netxen_nic_remove(struct pci_dev *pdev)
963{
964 struct netxen_adapter *adapter;
3176ff3e 965 struct net_device *netdev;
3d396eb1 966
6c80b18d 967 adapter = pci_get_drvdata(pdev);
3d396eb1
AK		 968 if (adapter == NULL)
969 return;
970
6c80b18d
MT		 971 netdev = adapter->netdev;
972
96acb6eb
DP		 973 unregister_netdev(netdev);
974
96acb6eb 975 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
3d396eb1 976 netxen_free_hw_resources(adapter);
9e410778 977 netxen_release_rx_buffers(adapter);
2956640d 978 netxen_free_sw_resources(adapter);
06e9d9f9
DP		 979
980 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
981 netxen_p3_free_mac_list(adapter);
96acb6eb 982 }
3d396eb1 983
439b454e
DP		 984 if (adapter->portnum == 0)
985 netxen_free_adapter_offload(adapter);
96acb6eb 986
3052246c 987 if (adapter->irq)
988 free_irq(adapter->irq, adapter);
989
97daee83 990 netxen_teardown_intr(adapter);
3052246c 991
97daee83 992 netxen_cleanup_pci_map(adapter);
595e3fb8
MT		 993
994 pci_release_regions(pdev);
3052246c 995 pci_disable_device(pdev);
595e3fb8
MT		 996 pci_set_drvdata(pdev, NULL);
997
6c80b18d 998 free_netdev(netdev);
3d396eb1
AK		 999}
1000
1001/*
1002 * Called when a network interface is made active
1003 * @returns 0 on success, negative value on failure
1004 */
1005static int netxen_nic_open(struct net_device *netdev)
1006{
4cf1653a 1007 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 1008 int err = 0;
1009 int ctx, ring;
05aaa02d
DP		 1010 irq_handler_t handler;
1011 unsigned long flags = IRQF_SAMPLE_RANDOM;
3d396eb1 1012
dcd56fdb
DP		 1013 if (adapter->driver_mismatch)
1014 return -EIO;
1015
3d396eb1
AK		 1016 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
1017 err = netxen_init_firmware(adapter);
1018 if (err != 0) {
1019 printk(KERN_ERR "Failed to init firmware\n");
1020 return -EIO;
1021 }
3d396eb1 1022
83821a07
DP		 1023 if (adapter->fw_major < 4)
1024 adapter->max_rds_rings = 3;
1025 else
1026 adapter->max_rds_rings = 2;
1027
2956640d 1028 err = netxen_alloc_sw_resources(adapter);
3d396eb1 1029 if (err) {
2956640d
DP		 1030 printk(KERN_ERR "%s: Error in setting sw resources\n",
1031 netdev->name);
3d396eb1
AK		 1032 return err;
1033 }
2956640d
DP		 1034
1035 netxen_nic_clear_stats(adapter);
1036
1037 err = netxen_alloc_hw_resources(adapter);
1038 if (err) {
1039 printk(KERN_ERR "%s: Error in setting hw resources\n",
1040 netdev->name);
1041 goto err_out_free_sw;
1042 }
1043
092bc571
DP		 1044 if ((adapter->msi_mode != MSI_MODE_MULTIFUNC) ||
1045 (adapter->intr_scheme != INTR_SCHEME_PERPORT)) {
1046 printk(KERN_ERR "%s: Firmware interrupt scheme is "
1047 "incompatible with driver\n",
1048 netdev->name);
1049 adapter->driver_mismatch = 1;
1050 goto err_out_free_hw;
1051 }
1052
2956640d
DP		 1053 if (adapter->fw_major < 4) {
1054 adapter->crb_addr_cmd_producer =
1055 crb_cmd_producer[adapter->portnum];
1056 adapter->crb_addr_cmd_consumer =
1057 crb_cmd_consumer[adapter->portnum];
2956640d 1058
83821a07
DP		 1059 netxen_nic_update_cmd_producer(adapter, 0);
1060 netxen_nic_update_cmd_consumer(adapter, 0);
1061 }
2956640d 1062
3d396eb1 1063 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
48bfd1e0 1064 for (ring = 0; ring < adapter->max_rds_rings; ring++)
3d396eb1 1065 netxen_post_rx_buffers(adapter, ctx, ring);
3d396eb1 1066 }
b3df68f8
DP		 1067 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
1068 handler = netxen_msix_intr;
1069 else if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
05aaa02d
DP		 1070 handler = netxen_msi_intr;
1071 else {
1072 flags |= IRQF_SHARED;
1073 handler = netxen_intr;
1074 }
2956640d 1075 adapter->irq = netdev->irq;
05aaa02d
DP		 1076 err = request_irq(adapter->irq, handler,
1077 flags, netdev->name, adapter);
3d396eb1
AK		 1078 if (err) {
1079 printk(KERN_ERR "request_irq failed with: %d\n", err);
9e410778 1080 goto err_out_free_rxbuf;
3d396eb1 1081 }
ed25ffa1
AK		 1082
1083 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
1084 }
2956640d 1085
3d396eb1
AK		 1086 /* Done here again so that even if phantom sw overwrote it,
1087 * we set it */
c9fc891f 1088 err = adapter->init_port(adapter, adapter->physical_port);
2956640d 1089 if (err) {
595e3fb8
MT		 1090 printk(KERN_ERR "%s: Failed to initialize port %d\n",
1091 netxen_nic_driver_name, adapter->portnum);
2956640d 1092 goto err_out_free_irq;
595e3fb8 1093 }
2956640d 1094 adapter->macaddr_set(adapter, netdev->dev_addr);
595e3fb8 1095
3176ff3e 1096 netxen_nic_set_link_parameters(adapter);
3d396eb1 1097
1abd266f 1098 netxen_set_multicast_list(netdev);
9ad27643 1099 if (adapter->set_mtu)
c9fc891f 1100 adapter->set_mtu(adapter, netdev->mtu);
ed25ffa1 1101
922c4f2c 1102 adapter->ahw.linkup = 0;
dcd56fdb 1103 mod_timer(&adapter->watchdog_timer, jiffies);
05aaa02d
DP		 1104
1105 napi_enable(&adapter->napi);
1106 netxen_nic_enable_int(adapter);
1107
dcd56fdb 1108 netif_start_queue(netdev);
3d396eb1
AK		 1109
1110 return 0;
2956640d
DP		 1111
1112err_out_free_irq:
1113 free_irq(adapter->irq, adapter);
9e410778
DP		 1114err_out_free_rxbuf:
1115 netxen_release_rx_buffers(adapter);
092bc571 1116err_out_free_hw:
2956640d
DP		 1117 netxen_free_hw_resources(adapter);
1118err_out_free_sw:
1119 netxen_free_sw_resources(adapter);
1120 return err;
3d396eb1
AK		 1121}
1122
1123/*
1124 * netxen_nic_close - Disables a network interface entry point
1125 */
1126static int netxen_nic_close(struct net_device *netdev)
1127{
3176ff3e 1128 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 1129
1130 netif_carrier_off(netdev);
1131 netif_stop_queue(netdev);
bea3348e 1132 napi_disable(&adapter->napi);
3d396eb1 1133
72b0a7a8 1134 if (adapter->stop_port)
1135 adapter->stop_port(adapter);
1136
e01872af 1137 netxen_nic_disable_int(adapter);
1138
2956640d
DP		 1139 netxen_release_tx_buffers(adapter);
1140
922c4f2c
DP		 1141 FLUSH_SCHEDULED_WORK();
1142 del_timer_sync(&adapter->watchdog_timer);
3d396eb1
AK		 1143
1144 return 0;
1145}
1146
391587c3 1147static bool netxen_tso_check(struct net_device *netdev,
cd1f8160
DP		 1148 struct cmd_desc_type0 *desc, struct sk_buff *skb)
1149{
391587c3
DP		 1150 bool tso = false;
1151 u8 opcode = TX_ETHER_PKT;
cdff1036
DP		 1152 __be16 protocol = skb->protocol;
1153 u16 flags = 0;
1154
09640e63 1155 if (protocol == cpu_to_be16(ETH_P_8021Q)) {
cdff1036
DP		 1156 struct vlan_ethhdr *vh = (struct vlan_ethhdr *)skb->data;
1157 protocol = vh->h_vlan_encapsulated_proto;
1158 flags = FLAGS_VLAN_TAGGED;
1159 }
cd1f8160 1160
391587c3
DP		 1161 if ((netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
1162 skb_shinfo(skb)->gso_size > 0) {
1163
1164 desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
1165 desc->total_hdr_length =
1166 skb_transport_offset(skb) + tcp_hdrlen(skb);
1167
09640e63 1168 opcode = (protocol == cpu_to_be16(ETH_P_IPV6)) ?
391587c3
DP		 1169 TX_TCP_LSO6 : TX_TCP_LSO;
1170 tso = true;
cd1f8160
DP		 1171
1172 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
391587c3
DP		 1173 u8 l4proto;
1174
09640e63 1175 if (protocol == cpu_to_be16(ETH_P_IP)) {
391587c3
DP		 1176 l4proto = ip_hdr(skb)->protocol;
1177
1178 if (l4proto == IPPROTO_TCP)
1179 opcode = TX_TCP_PKT;
1180 else if(l4proto == IPPROTO_UDP)
1181 opcode = TX_UDP_PKT;
09640e63 1182 } else if (protocol == cpu_to_be16(ETH_P_IPV6)) {
391587c3
DP		 1183 l4proto = ipv6_hdr(skb)->nexthdr;
1184
1185 if (l4proto == IPPROTO_TCP)
1186 opcode = TX_TCPV6_PKT;
1187 else if(l4proto == IPPROTO_UDP)
1188 opcode = TX_UDPV6_PKT;
1189 }
cd1f8160
DP		 1190 }
1191 desc->tcp_hdr_offset = skb_transport_offset(skb);
1192 desc->ip_hdr_offset = skb_network_offset(skb);
cdff1036 1193 netxen_set_tx_flags_opcode(desc, flags, opcode);
391587c3 1194 return tso;
cd1f8160
DP		 1195}
1196
6f703406
DP		 1197static void
1198netxen_clean_tx_dma_mapping(struct pci_dev *pdev,
1199 struct netxen_cmd_buffer *pbuf, int last)
1200{
1201 int k;
1202 struct netxen_skb_frag *buffrag;
1203
1204 buffrag = &pbuf->frag_array[0];
1205 pci_unmap_single(pdev, buffrag->dma,
1206 buffrag->length, PCI_DMA_TODEVICE);
1207
1208 for (k = 1; k < last; k++) {
1209 buffrag = &pbuf->frag_array[k];
1210 pci_unmap_page(pdev, buffrag->dma,
1211 buffrag->length, PCI_DMA_TODEVICE);
1212 }
1213}
1214
3d396eb1
AK		 1215static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1216{
3176ff3e 1217 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 1218 struct netxen_hardware_context *hw = &adapter->ahw;
1219 unsigned int first_seg_len = skb->len - skb->data_len;
391587c3 1220 struct netxen_cmd_buffer *pbuf;
3d396eb1 1221 struct netxen_skb_frag *buffrag;
391587c3 1222 struct cmd_desc_type0 *hwdesc;
6f703406
DP		 1223 struct pci_dev *pdev = adapter->pdev;
1224 dma_addr_t temp_dma;
391587c3 1225 int i, k;
3d396eb1 1226
ba53e6b4 1227 u32 producer, consumer;
391587c3 1228 int frag_count, no_of_desc;
ba53e6b4 1229 u32 num_txd = adapter->max_tx_desc_count;
391587c3 1230 bool is_tso = false;
3d396eb1 1231
3d396eb1
AK		 1232 frag_count = skb_shinfo(skb)->nr_frags + 1;
1233
3d396eb1
AK		 1234 /* There 4 fragments per descriptor */
1235 no_of_desc = (frag_count + 3) >> 2;
53a01e00 1236
ba53e6b4
DP		 1237 producer = adapter->cmd_producer;
1238 smp_mb();
1239 consumer = adapter->last_cmd_consumer;
1240 if ((no_of_desc+2) > find_diff_among(producer, consumer, num_txd)) {
1241 netif_stop_queue(netdev);
1242 smp_mb();
1243 return NETDEV_TX_BUSY;
53a01e00 1244 }
3d396eb1 1245
3d396eb1 1246 /* Copy the descriptors into the hardware */
3d396eb1
AK		 1247 hwdesc = &hw->cmd_desc_head[producer];
1248 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1249 /* Take skb->data itself */
1250 pbuf = &adapter->cmd_buf_arr[producer];
391587c3
DP		 1251
1252 is_tso = netxen_tso_check(netdev, hwdesc, skb);
1253
3d396eb1 1254 pbuf->skb = skb;
3d396eb1 1255 pbuf->frag_count = frag_count;
3d396eb1 1256 buffrag = &pbuf->frag_array[0];
6f703406 1257 temp_dma = pci_map_single(pdev, skb->data, first_seg_len,
3d396eb1 1258 PCI_DMA_TODEVICE);
6f703406
DP		 1259 if (pci_dma_mapping_error(pdev, temp_dma))
1260 goto drop_packet;
1261
1262 buffrag->dma = temp_dma;
3d396eb1 1263 buffrag->length = first_seg_len;
391587c3
DP		 1264 netxen_set_tx_frags_len(hwdesc, frag_count, skb->len);
1265 netxen_set_tx_port(hwdesc, adapter->portnum);
3d396eb1 1266
3d396eb1
AK		 1267 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
1268 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
1269
1270 for (i = 1, k = 1; i < frag_count; i++, k++) {
1271 struct skb_frag_struct *frag;
1272 int len, temp_len;
1273 unsigned long offset;
3d396eb1
AK		 1274
1275 /* move to next desc. if there is a need */
1276 if ((i & 0x3) == 0) {
1277 k = 0;
ba53e6b4 1278 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1279 hwdesc = &hw->cmd_desc_head[producer];
1280 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
53a01e00 1281 pbuf = &adapter->cmd_buf_arr[producer];
1282 pbuf->skb = NULL;
3d396eb1
AK		 1283 }
1284 frag = &skb_shinfo(skb)->frags[i - 1];
1285 len = frag->size;
1286 offset = frag->page_offset;
1287
1288 temp_len = len;
6f703406 1289 temp_dma = pci_map_page(pdev, frag->page, offset,
3d396eb1 1290 len, PCI_DMA_TODEVICE);
6f703406
DP		 1291 if (pci_dma_mapping_error(pdev, temp_dma)) {
1292 netxen_clean_tx_dma_mapping(pdev, pbuf, i);
1293 goto drop_packet;
1294 }
3d396eb1
AK		 1295
1296 buffrag++;
1297 buffrag->dma = temp_dma;
1298 buffrag->length = temp_len;
1299
3d396eb1
AK		 1300 switch (k) {
1301 case 0:
1302 hwdesc->buffer1_length = cpu_to_le16(temp_len);
1303 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
1304 break;
1305 case 1:
1306 hwdesc->buffer2_length = cpu_to_le16(temp_len);
1307 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
1308 break;
1309 case 2:
1310 hwdesc->buffer3_length = cpu_to_le16(temp_len);
1311 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1312 break;
1313 case 3:
a608ab9c 1314 hwdesc->buffer4_length = cpu_to_le16(temp_len);
3d396eb1
AK		 1315 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1316 break;
1317 }
1318 frag++;
1319 }
ba53e6b4 1320 producer = get_next_index(producer, num_txd);
3d396eb1 1321
3d396eb1
AK		 1322 /* For LSO, we need to copy the MAC/IP/TCP headers into
1323 * the descriptor ring
1324 */
391587c3 1325 if (is_tso) {
3d396eb1 1326 int hdr_len, first_hdr_len, more_hdr;
391587c3 1327 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
ed25ffa1
AK		 1328 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1329 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
3d396eb1
AK		 1330 more_hdr = 1;
1331 } else {
1332 first_hdr_len = hdr_len;
1333 more_hdr = 0;
1334 }
1335 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1336 hwdesc = &hw->cmd_desc_head[producer];
53a01e00 1337 pbuf = &adapter->cmd_buf_arr[producer];
1338 pbuf->skb = NULL;
3d396eb1
AK		 1339
1340 /* copy the first 64 bytes */
ed25ffa1 1341 memcpy(((void *)hwdesc) + 2,
3d396eb1 1342 (void *)(skb->data), first_hdr_len);
ba53e6b4 1343 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1344
1345 if (more_hdr) {
1346 hwdesc = &hw->cmd_desc_head[producer];
53a01e00 1347 pbuf = &adapter->cmd_buf_arr[producer];
1348 pbuf->skb = NULL;
3d396eb1
AK		 1349 /* copy the next 64 bytes - should be enough except
1350 * for pathological case
1351 */
d626f62b
ACM		 1352 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1353 hwdesc,
1354 (hdr_len -
1355 first_hdr_len));
ba53e6b4 1356 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1357 }
1358 }
6c80b18d 1359
ba53e6b4 1360 adapter->cmd_producer = producer;
5dc16268 1361 adapter->stats.txbytes += skb->len;
6c80b18d 1362
ba53e6b4 1363 netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
3d396eb1 1364
ba53e6b4 1365 adapter->stats.xmitcalled++;
3d396eb1
AK		 1366 netdev->trans_start = jiffies;
1367
3d396eb1 1368 return NETDEV_TX_OK;
6f703406
DP		 1369
1370drop_packet:
1371 adapter->stats.txdropped++;
1372 dev_kfree_skb_any(skb);
1373 return NETDEV_TX_OK;
3d396eb1
AK		 1374}
1375
a97342f9
DP		 1376static int netxen_nic_check_temp(struct netxen_adapter *adapter)
1377{
1378 struct net_device *netdev = adapter->netdev;
1379 uint32_t temp, temp_state, temp_val;
1380 int rv = 0;
1381
1382 temp = adapter->pci_read_normalize(adapter, CRB_TEMP_STATE);
1383
1384 temp_state = nx_get_temp_state(temp);
1385 temp_val = nx_get_temp_val(temp);
1386
1387 if (temp_state == NX_TEMP_PANIC) {
1388 printk(KERN_ALERT
1389 "%s: Device temperature %d degrees C exceeds"
1390 " maximum allowed. Hardware has been shut down.\n",
1391 netxen_nic_driver_name, temp_val);
1392
1393 netif_carrier_off(netdev);
1394 netif_stop_queue(netdev);
1395 rv = 1;
1396 } else if (temp_state == NX_TEMP_WARN) {
1397 if (adapter->temp == NX_TEMP_NORMAL) {
1398 printk(KERN_ALERT
1399 "%s: Device temperature %d degrees C "
1400 "exceeds operating range."
1401 " Immediate action needed.\n",
1402 netxen_nic_driver_name, temp_val);
1403 }
1404 } else {
1405 if (adapter->temp == NX_TEMP_WARN) {
1406 printk(KERN_INFO
1407 "%s: Device temperature is now %d degrees C"
1408 " in normal range.\n", netxen_nic_driver_name,
1409 temp_val);
1410 }
1411 }
1412 adapter->temp = temp_state;
1413 return rv;
1414}
1415
1416static void netxen_nic_handle_phy_intr(struct netxen_adapter *adapter)
1417{
1418 struct net_device *netdev = adapter->netdev;
1419 u32 val, port, linkup;
1420
1421 port = adapter->physical_port;
1422
24a7a455
DP		 1423 if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
1424 val = adapter->pci_read_normalize(adapter, CRB_XG_STATE_P3);
1425 val = XG_LINK_STATE_P3(adapter->ahw.pci_func, val);
1426 linkup = (val == XG_LINK_UP_P3);
c9fc891f 1427 } else {
24a7a455
DP		 1428 val = adapter->pci_read_normalize(adapter, CRB_XG_STATE);
1429 if (adapter->ahw.board_type == NETXEN_NIC_GBE)
1430 linkup = (val >> port) & 1;
1431 else {
c9fc891f
DP		 1432 val = (val >> port*8) & 0xff;
1433 linkup = (val == XG_LINK_UP);
c9fc891f 1434 }
a97342f9
DP		 1435 }
1436
1437 if (adapter->ahw.linkup && !linkup) {
1438 printk(KERN_INFO "%s: %s NIC Link is down\n",
1439 netxen_nic_driver_name, netdev->name);
1440 adapter->ahw.linkup = 0;
1441 if (netif_running(netdev)) {
1442 netif_carrier_off(netdev);
1443 netif_stop_queue(netdev);
1444 }
c7860a2a
DP		 1445
1446 netxen_nic_set_link_parameters(adapter);
a97342f9
DP		 1447 } else if (!adapter->ahw.linkup && linkup) {
1448 printk(KERN_INFO "%s: %s NIC Link is up\n",
1449 netxen_nic_driver_name, netdev->name);
1450 adapter->ahw.linkup = 1;
1451 if (netif_running(netdev)) {
1452 netif_carrier_on(netdev);
1453 netif_wake_queue(netdev);
1454 }
c7860a2a
DP		 1455
1456 netxen_nic_set_link_parameters(adapter);
a97342f9
DP		 1457 }
1458}
1459
3d396eb1
AK		 1460static void netxen_watchdog(unsigned long v)
1461{
1462 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
ed25ffa1
AK		 1463
1464 SCHEDULE_WORK(&adapter->watchdog_task);
3d396eb1
AK		 1465}
1466
a97342f9
DP		 1467void netxen_watchdog_task(struct work_struct *work)
1468{
1469 struct netxen_adapter *adapter =
1470 container_of(work, struct netxen_adapter, watchdog_task);
1471
1472 if ((adapter->portnum == 0) && netxen_nic_check_temp(adapter))
1473 return;
1474
1475 netxen_nic_handle_phy_intr(adapter);
1476
922c4f2c
DP		 1477 if (netif_running(adapter->netdev))
1478 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
a97342f9
DP		 1479}
1480
3d396eb1
AK		 1481static void netxen_tx_timeout(struct net_device *netdev)
1482{
3176ff3e
MT		 1483 struct netxen_adapter *adapter = (struct netxen_adapter *)
1484 netdev_priv(netdev);
1485 SCHEDULE_WORK(&adapter->tx_timeout_task);
3d396eb1
AK		 1486}
1487
6d5aefb8 1488static void netxen_tx_timeout_task(struct work_struct *work)
3d396eb1 1489{
4790654c 1490 struct netxen_adapter *adapter =
3176ff3e 1491 container_of(work, struct netxen_adapter, tx_timeout_task);
3d396eb1
AK		 1492
1493 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
6c80b18d 1494 netxen_nic_driver_name, adapter->netdev->name);
3d396eb1 1495
ba53e6b4
DP		 1496 netxen_nic_disable_int(adapter);
1497 napi_disable(&adapter->napi);
1498
6c80b18d 1499 adapter->netdev->trans_start = jiffies;
ba53e6b4
DP		 1500
1501 napi_enable(&adapter->napi);
1502 netxen_nic_enable_int(adapter);
6c80b18d 1503 netif_wake_queue(adapter->netdev);
3d396eb1
AK		 1504}
1505
a97342f9
DP		 1506/*
1507 * netxen_nic_get_stats - Get System Network Statistics
1508 * @netdev: network interface device structure
1509 */
1510struct net_device_stats *netxen_nic_get_stats(struct net_device *netdev)
1511{
1512 struct netxen_adapter *adapter = netdev_priv(netdev);
1513 struct net_device_stats *stats = &adapter->net_stats;
1514
1515 memset(stats, 0, sizeof(*stats));
1516
1517 /* total packets received */
1518 stats->rx_packets = adapter->stats.no_rcv;
1519 /* total packets transmitted */
1520 stats->tx_packets = adapter->stats.xmitedframes +
1521 adapter->stats.xmitfinished;
1522 /* total bytes received */
1523 stats->rx_bytes = adapter->stats.rxbytes;
1524 /* total bytes transmitted */
1525 stats->tx_bytes = adapter->stats.txbytes;
1526 /* bad packets received */
1527 stats->rx_errors = adapter->stats.rcvdbadskb;
1528 /* packet transmit problems */
1529 stats->tx_errors = adapter->stats.nocmddescriptor;
1530 /* no space in linux buffers */
1531 stats->rx_dropped = adapter->stats.rxdropped;
1532 /* no space available in linux */
1533 stats->tx_dropped = adapter->stats.txdropped;
1534
1535 return stats;
1536}
1537
e4c93c81 1538static irqreturn_t netxen_intr(int irq, void *data)
3d396eb1 1539{
1daec86a 1540 struct netxen_adapter *adapter = data;
d71e1be8
DP		 1541 u32 status = 0;
1542
1543 status = adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);
1544
1545 if (!(status & adapter->legacy_intr.int_vec_bit))
05aaa02d 1546 return IRQ_NONE;
e01872af 1547
d71e1be8
DP		 1548 if (adapter->ahw.revision_id >= NX_P3_B1) {
1549 /* check interrupt state machine, to be sure */
1550 status = adapter->pci_read_immediate(adapter,
1551 ISR_INT_STATE_REG);
1552 if (!ISR_LEGACY_INT_TRIGGERED(status))
1553 return IRQ_NONE;
1554
092bc571
DP		 1555 } else {
1556 unsigned long our_int = 0;
d71e1be8
DP		 1557
1558 our_int = adapter->pci_read_normalize(adapter, CRB_INT_VECTOR);
092bc571 1559
d71e1be8 1560 /* not our interrupt */
092bc571 1561 if (!test_and_clear_bit((7 + adapter->portnum), &our_int))
d71e1be8
DP		 1562 return IRQ_NONE;
1563
092bc571
DP		 1564 /* claim interrupt */
1565 adapter->pci_write_normalize(adapter,
1566 CRB_INT_VECTOR, (our_int & 0xffffffff));
e01872af 1567 }
1568
092bc571
DP		 1569 /* clear interrupt */
1570 if (adapter->fw_major < 4)
1571 netxen_nic_disable_int(adapter);
1572
1573 adapter->pci_write_immediate(adapter,
1574 adapter->legacy_intr.tgt_status_reg,
1575 0xffffffff);
1576 /* read twice to ensure write is flushed */
1577 adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);
1578 adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);
1579
1580 napi_schedule(&adapter->napi);
3d396eb1
AK		 1581
1582 return IRQ_HANDLED;
1583}
1584
e4c93c81 1585static irqreturn_t netxen_msi_intr(int irq, void *data)
05aaa02d
DP		 1586{
1587 struct netxen_adapter *adapter = data;
1588
092bc571
DP		 1589 /* clear interrupt */
1590 adapter->pci_write_immediate(adapter,
1591 msi_tgt_status[adapter->ahw.pci_func], 0xffffffff);
1592
1593 napi_schedule(&adapter->napi);
05aaa02d
DP		 1594 return IRQ_HANDLED;
1595}
1596
b3df68f8
DP		 1597static irqreturn_t netxen_msix_intr(int irq, void *data)
1598{
1599 struct netxen_adapter *adapter = data;
1600
1601 napi_schedule(&adapter->napi);
1602 return IRQ_HANDLED;
1603}
1604
bea3348e 1605static int netxen_nic_poll(struct napi_struct *napi, int budget)
3d396eb1 1606{
bea3348e 1607 struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
05aaa02d 1608 int tx_complete;
3d396eb1 1609 int ctx;
bea3348e 1610 int work_done;
3d396eb1 1611
05aaa02d 1612 tx_complete = netxen_process_cmd_ring(adapter);
3d396eb1 1613
80922fbc 1614 work_done = 0;
3d396eb1
AK		 1615 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1616 /*
1617 * Fairness issue. This will give undue weight to the
1618 * receive context 0.
1619 */
1620
1621 /*
1622 * To avoid starvation, we give each of our receivers,
1623 * a fraction of the quota. Sometimes, it might happen that we
1624 * have enough quota to process every packet, but since all the
1625 * packets are on one context, it gets only half of the quota,
1626 * and ends up not processing it.
1627 */
bea3348e
SH		 1628 work_done += netxen_process_rcv_ring(adapter, ctx,
1629 budget / MAX_RCV_CTX);
3d396eb1
AK		 1630 }
1631
05aaa02d 1632 if ((work_done < budget) && tx_complete) {
288379f0 1633 napi_complete(&adapter->napi);
3d396eb1
AK		 1634 netxen_nic_enable_int(adapter);
1635 }
1636
bea3348e 1637 return work_done;
3d396eb1
AK		 1638}
1639
1640#ifdef CONFIG_NET_POLL_CONTROLLER
1641static void netxen_nic_poll_controller(struct net_device *netdev)
1642{
3176ff3e 1643 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1 1644 disable_irq(adapter->irq);
1494a814 1645 netxen_intr(adapter->irq, adapter);
3d396eb1
AK		 1646 enable_irq(adapter->irq);
1647}
1648#endif
3d396eb1
AK		 1649
1650static struct pci_driver netxen_driver = {
1651 .name = netxen_nic_driver_name,
1652 .id_table = netxen_pci_tbl,
1653 .probe = netxen_nic_probe,
1654 .remove = __devexit_p(netxen_nic_remove)
1655};
1656
1657/* Driver Registration on NetXen card */
1658
1659static int __init netxen_init_module(void)
1660{
79ea13ce 1661 if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
ed25ffa1
AK		 1662 return -ENOMEM;
1663
184231bd 1664 return pci_register_driver(&netxen_driver);
3d396eb1
AK		 1665}
1666
1667module_init(netxen_init_module);
1668
1669static void __exit netxen_exit_module(void)
1670{
3d396eb1 1671 pci_unregister_driver(&netxen_driver);
9de06610 1672 destroy_workqueue(netxen_workq);
3d396eb1
AK		 1673}
1674
1675module_exit(netxen_exit_module);
Linux 6.x block layer and io_uring tree(s)